Romen Numbers

gistfile1.py

roman = ['M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I']
values = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1]
romanDict = {'I': 1, 'V': 5, 'X': 10, 'L': 50, 'C': 100, 'D': 500, 'M': 1000}

def int_to_roman(strnumber):

    result = ""
    number = int(strnumber)
    for i, v in enumerate(values):
        while (number >= v):
            number -= v
            result += roman[i]
    return result

def roman_to_int(s):

    sum = 0

    while s:
        if len(s) == 1:
            sum += romanDict[s[0]]
            break
        if romanDict[s[0]] >= romanDict[s[1]]:
            sum += romanDict[s[0]]
            s = s[1:]
        else:
            sum += romanDict[s[1]] - romanDict[s[0]]
            s = s[2:]

    return sum

for k in range(1,51): # ilk 50 sayi ve roman degerleri
    print str(roman_to_int(int_to_roman(k))) + " ---> " + int_to_roman(k)